"I've just bought these books for you", my mother said to me.

`->`Answer : My mother said to me that she had just bought those books for me.

`=>`Form : S + said to O ( that ) + S + V lùi thì...

- I `->`She ( Đổi ngôi )

-'ve just bought  `->`had just bought ( Lùi thì )

- these `->`those

- you `->`me

`=>` My mother said to me that she had just bought those books for me.

`-` Reported speech: Statement.

`-` Cấu trúc: S + said/ told + O + (that) + S + V(lùi thì)

`-` Đổi ngôi: I `->` she

`-` Lùi thì ĐT: 've just bought `->` had just bought (Thì HTHT `->` Thì QKHT)

`-` Tính từ chỉ định: these `->` those

`-` Đổi đại từ: you `->` me